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Classification – natural and synthetic, methods of polymerization (addition and condensation), copolymerization, some important polymers: natural and synthetic like polythene, nylon polyesters, bakelite, rubber. Biodegradable and non-biodegradable polymers.

chemistry 12th class cbse notes

Rubber and its types

Type of Rubbers: Natural rubber: Natural rubber has remarkable elasticity and it undergoes long-range reversible extensions. It is manufactured from latex-latex is obtained...
chemistry 12th class cbse notes

Biodegradable polymers

The biopolymers which disintegrate by themselves in biological systems during a certain period of time by enzymatic hydrolysis and to some extent by oxidation...
chemistry 12th class cbse notes

Condensation Polymerisation or Step Growth Polymerisation

If the two bifunctional monomer molecules undergo condensation with loss of a simple molecule of water, alcohol etc. Polyamides: These polymers possessing amide linkages are important...
chemistry 12th class cbse notes

Types of Polymerisation Reactions

Types of Polymerisation Reactions: There are two broad types of polymerisation reactions, i.e., the addition or chain growth polymerisation and condensation or step growth polymerisation. Addition...
chemistry 12th class cbse notes

Classification of Polymers

Classification of Polymers: There are several ways of classification of polymers based on some special considerations. Based on Source: Under this type of classification, there are three...
chemistry 12th class cbse notes


Polymer A polymer may be defined as a high molecular weight compound formed by the combination of a large number of one or more types...